make4ht – A build system for tex4ht

make4ht is a sim­ple build sys­tem for tex4ht, a TeX to XML con­verter. It
pro­vides a com­mand line tool that drives the con­ver­sion pro­cess.
It also pro­vides a li­brary which can be used to cre­ate
cus­tomized con­ver­sion tools.